Just thought I'd post some before/after pics of a product I used to remove the rust on my block prior to painting. Actually, the block had already been painted yellow, but I wanted to change to gray, so chemically stripped all the old paint off, after which I found the block underneath was rusty. The rust remover I use is amazing stuff as it's non-toxic and non-caustic and it's even fine to get on your skin and wont damage paint, chrome, plastics, etc. Anyway, take a look...